/
parser.go
119 lines (100 loc) · 3.24 KB
/
parser.go
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package asciinema_parser
import (
"bufio"
"bytes"
"context"
"encoding/json"
"fmt"
"github.com/tidwall/gjson"
"strconv"
)
// ------------------------------------------------- --------------------------------------------------------------------
type Version uint
const (
VersionUnknown Version = 0
Version1 Version = 1
Version2 Version = 2
)
// ------------------------------------------------- --------------------------------------------------------------------
func DetectVersion(ctx context.Context, asciiCastString string) (Version, error) {
versionResult := gjson.Get(asciiCastString, "version")
atoi, err := strconv.Atoi(versionResult.String())
if err != nil {
return VersionUnknown, err
}
switch Version(atoi) {
case Version1:
return Version1, nil
case Version2:
return Version2, nil
default:
return VersionUnknown, fmt.Errorf("unknown version: %s", versionResult.String())
}
}
// ------------------------------------------------- --------------------------------------------------------------------
// ParseV1 解析V1版本的Ascii Cast 文件
// https://github.com/asciinema/asciinema/blob/develop/doc/asciicast-v1.md
func ParseV1(ctx context.Context, asciiCastV1Bytes []byte) (*AsciiCastV1, error) {
cast := &AsciiCastV1{}
err := json.Unmarshal(asciiCastV1Bytes, cast)
if err != nil {
return nil, err
}
if err := cast.Check(); err != nil {
return nil, err
}
return cast, nil
}
// ------------------------------------------------- --------------------------------------------------------------------
// ParseV2 解析V2版本的Ascii Cast文件
// v2格式规范的文档: https://github.com/asciinema/asciinema/blob/develop/doc/asciicast-v2.md
func ParseV2(ctx context.Context, asciiCastV2Bytes []byte) (*AsciiCastV2, error) {
scanner := bufio.NewScanner(bytes.NewBuffer(asciiCastV2Bytes))
// 读取第一行
if !scanner.Scan() {
return nil, fmt.Errorf("asciiCastV2Bytes %s is invalid", string(asciiCastV2Bytes))
}
firstLineBytes := scanner.Bytes()
cast := &AsciiCastV2{}
err := json.Unmarshal(firstLineBytes, cast)
if err != nil {
return nil, err
}
// 读取后续的行,追加到数组中,这里暂时不考虑放不下的情况
lineNum := 2
for scanner.Scan() {
lineBytes := scanner.Bytes()
slice := make([]any, 0)
err := json.Unmarshal(lineBytes, &slice)
if err != nil {
return nil, err
}
if len(slice) != 3 {
return nil, fmt.Errorf("line %d is invalid event: %s", lineNum, string(lineBytes))
}
delay, ok := slice[0].(float64)
if !ok {
return nil, fmt.Errorf("line %d is invalid event: %s", lineNum, string(lineBytes))
}
eventTypeString, ok := slice[1].(string)
if !ok {
return nil, fmt.Errorf("line %d is invalid event: %s", lineNum, string(lineBytes))
}
eventType, err := ParseEventType(eventTypeString)
if err != nil {
return nil, err
}
data, ok := slice[2].(string)
if !ok {
return nil, fmt.Errorf("line %d is invalid event: %s", lineNum, string(lineBytes))
}
cast.EventStream = append(cast.EventStream, &Event{
cast: cast,
Delay: delay,
EventType: eventType,
EventData: data,
})
}
return cast, nil
}
// ------------------------------------------------- --------------------------------------------------------------------